1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <streambuf> 11 12 // template <class charT, class traits = char_traits<charT> > 13 // class basic_streambuf; 14 15 // streamsize in_avail(); 16 17 #include <streambuf> 18 #include <cassert> 19 20 int showmanyc_called = 0; 21 22 template <class CharT> 23 struct test 24 : public std::basic_streambuf<CharT> 25 { 26 typedef std::basic_streambuf<CharT> base; 27 28 test() {} 29 30 void setg(CharT* gbeg, CharT* gnext, CharT* gend) 31 { 32 base::setg(gbeg, gnext, gend); 33 } 34 protected: 35 std::streamsize showmanyc() 36 { 37 ++showmanyc_called; 38 return 5; 39 } 40 }; 41 42 int main() 43 { 44 { 45 test<char> t; 46 assert(t.in_avail() == 5); 47 assert(showmanyc_called == 1); 48 char in[5]; 49 t.setg(in, in+2, in+5); 50 assert(t.in_avail() == 3); 51 } 52 } 53
